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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).
hormones
mare estrus cycle
Avg. bull specs
estrus
2. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg
Mares
Follical Stimulating in females
testis (gonads)
sperm cell
3. What about the sperm for a bull which has been castrated but still has testicles?
pelvis
effects of BST
estrus
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
4. Days which have increasing daylight hours
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5. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)
cervix
seasonally polyestrous
Size of cow in relation to the amount of milk produced
sertoli cells
6. Days which have decreasing daylight hours
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7. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)
cowper's gland
Hard
4 major reasons for culling dairy cows
humans: stress level vs sperm
8. Parturition is controlled by...
leydid or interstitial cells
Hormones from both the fetus and the mom.
penis sizes vs delivering methods
dairy cattle pregnancy check
9. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.
mare estrus
seminiferous tubules
Holstein Cow
penis sizes vs delivering methods
10. % of fat in milk. makes cheeses and ice cream. regulates cost of milk
#1 cost in production
Sperm growth rate
butterfat
Follical Stimulating in females
11. 19-23 (21) days
functions of progestrone
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
cow estrus cycle
elastrator
12. 1-2 days
Dairy calves are removed from cow at birth to...
cervix
scrotum
ewe estrus
13. 45-60 days after breeding; re-breed as required
reason for seasonal breeding periods
cow estrus
dairy cattle pregnancy check
Lutinizing Hormone in males
14. FEED
prostate gland
#1 cost in production
femininity of a heifer
Avg. bull specs
15. Milk ~305 days - dry 60 days prior to calving
cryptorchid
Parturition
sow estrus cycle
Dairy Cattle milking schedule
16. Look for infection - split - and rupture of the penis
penis and prepuce observation (BSE)
what has to happen for males for copulation to occur
rectal palpation (BSE)
mastitis
17. 30-38 hours after estrus cycle begins
Hard
Sperm growth rate
sow ovulation
Jersey Cow
18. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.
reason for seasonal breeding periods
van deferens
Hormones from both the fetus and the mom.
6-8 weeks
19. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has
Dairy Cattle Lactation (standard)
monestrous
Dairy Cattle milking schedule
rectal palpation (BSE)
20. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING
Culls bulls earlier (2 reasons)
4 major reasons for culling dairy cows
reason for seasonal breeding periods
elastrator
21. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has
estrous
scrotal circumference (BSE)
penis sizes vs delivering methods
rectal palpation (BSE)
22. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.
stag
uterus
feeding a high producing dairy cow
cowper's gland
23. 1-3 days
elastrator
sow estrus
Dairy Cattle milking schedule
van deferens
24. 14-19 (17) days
ewe estrus cycle
epididymis: definition - 3 parts - 4 functions
Jersey Cow
Dairy Cattle Lactation (standard)
25. Knife-loose ~1wk of growth. band-loose ~2wks of growth.
visual evaluation (BSE)
leydid or interstitial cells
dartos muscle
growth lost from castration methods (knife & band)
26. Produce testosterone. located between the seminiferous tubules
scrotal circumference (BSE)
dartos muscle
Mares
leydid or interstitial cells
27. 26 hours after estrus begins
hypothalamus and pituitary gland
ewe ovulation
vulva
sow estrus
28. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
dartos muscle
6-8 weeks
pelvis
Follical Stimulating in males
29. What helps regulate spermatogenesis?
testosterone
Brown Swiss Cow
sperm cell
cow estrus cycle
30. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
Where livelihood is in agriculture
cryptorchid
dartos muscle
Grading choice
31. Superior genes are _______ to multiply
Brown Swiss Cow
Hard
colostrum
sow gestation
32. What helps regulate spermatogenesis?
testosterone
castration
femininity of a heifer
Grading choice
33. Luteolysis happens because of the ____________ hormone
ewe ovulation
prostaglandin
Brown Swiss Cow
Hormones from both the fetus and the mom.
34. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.
Culls bulls earlier (2 reasons)
scrotum
pelvis
testis (gonads)
35. 19-23 (21) days
ewe's estrous cycle
sow estrus cycle
monorchid
Sperm growth rate
36. Produce testosterone. located between the seminiferous tubules
epididymis: definition - 3 parts - 4 functions
sow ovulation
sow estrus
leydid or interstitial cells
37. Failure to have one testis (gonad) to descend
monorchid
testis (gonads)
things to check for in a breeding soundness exam (BSE)
uterus
38. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.
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39. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total
testis (gonads)
scrotal circumference (BSE)
leydid or interstitial cells
monorchid
40. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off
elastrator
Parturition
Blood
what has to happen for males for copulation to occur
41. 336 days
things to check for in a breeding soundness exam (BSE)
cryptorchid
mare gestation
Bull's fibro-elastic penis
42. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.
scrotum
Culls bulls earlier (2 reasons)
Parturition
Size of cow in relation to the amount of milk produced
43. Check feet and legs - look for masculine traits in build such as crest and muscling
visual evaluation (BSE)
6-8 weeks
what has to happen for males for copulation to occur
Where livelihood is in agriculture
44. (FSH) causes egg to mature in females
Follical Stimulating in females
mastitis
organs used in spermatogenesis
sow estrus cycle
45. Why Dairy calves are fed powdered milk.
ewe's estrous cycle
Avg. bull specs
behavioral signs of estrus
1. more cost effective - 2. powdered milk is in excess production
46. 19-23 (21) days
burdizzo
Blood
why does the cow need fat deposits during pregnancy?
cow estrus cycle
47. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days
cow estrus cycle
#1 cost in production
mare ovulation
epididymis: definition - 3 parts - 4 functions
48. To remove/separate testicles from animal's body before animal reaches puberty
cow gestation
scrotum
cow ovulation
castration
49. Sperm production
ewe ovulation
spermatogenesis
epididymis: definition - 3 parts - 4 functions
4 major reasons for culling dairy cows
50. Male on one pin and female on other side
libido test (BSE)
Mares
ewe ovulation
dartos muscle